.content1 {
    ul {
        display: flex;
        list-style: none;
        margin: 34px;
        justify-content: space-between;
        li {
            height: 42px;
            padding: 0 30px;
            line-height: 42px;
            border-radius: 18px;
            font-size: 28px;
            &:first-child {
                background-color: #999999;
                color: #fff;
            }
            &:hover {
                background-color: #999999;
                color: #fff;
            }
        }
    }
}
.content3 {
    margin: 42px 0 41px 23px;
    p {
        font-size: 30px;
        color: #000;
        font-weight: 100px;
    }
    .yx1 {
        margin: 32px 148px;
        list-style: none;
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
        .yx2 {

            text-align: center;
            display:inline-block;
            height: 200px;
            margin-bottom: 50px;
            width: 190px;
            background-color: #dddddd;
            @for $num from 1 to 5 {
                &:nth-child(#{$num})> .bj {
                    margin-top: 21px;
                    width: 105px;
                    height: 105px;
                    background-color: pink;
                    background: url(../images/陌BB#{$num}.png) no-repeat;
                }
            }
                p {
                    font-size: 26px;
                    color: #464646;
                }
        }
    }
}


.content4 {
    height: 130px;
}